Putting a capital letter in the middle of a word is never correct, as far as I'm concerned, although I'll grudgingly give in in a few cases of trademarks or other proper nouns. What are they going to do if they want to start a sentence with it?

You still use eBook (with the lowercase e) if you are to start a sentence using it.

All those are examples where the word would be capitalised (note all the other capitalised words), or is a proper name (eBooks.com).

Where the word is not capitalised, I would always now use ebook. (My preferred choice of e.book never did catch on, although it's clearly the 'correct' form, as the e is an abbreviation for electronic.)

Who cares? That's like saying it doesn't matter if you vote Republican, Democratic, or Independent. That's like saying it makes no difference if you dip or sprinkle. Who cares? You might as well say either pc OR Mac is fine.

The correct form has no dash. I gave plenty of example of eBook being used in a professional capacity.

I can find hundreds of examples of people using "irregardles." I'm still going to say they're wrong.

Furthermore, having worked around marketing types a fair bit, I wouldn't let them be the final arbiters. They have, at best, a loose grasp on language, reality, and the truth. They love exclamation marks and arbitrary capitalization, though.

I can find hundreds of examples of people using "irregardles." I'm still going to say they're wrong.

Furthermore, having worked around marketing types a fair bit, I wouldn't let them be the final arbiters. They have, at best, a loose grasp on language, reality, and the truth. They love exclamation marks and arbitrary capitalization, though.